For over 38 years, Numa has built a strong legacy of high quality, Made in the USA rock drilling hammers, bits, and accessories for drilling DTH, HDD, and reverse circulation holes 3½ to 50½ inches (89 – 1283 mm) in diameter. Numa’s long history of innovation and expertise has resulted in a wide range of reliable DTH and HDD products perfectly suited for hard rock, overburden, or loose strata formations.
